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First northern giant petrel (Macronectes halli) breeding population survey and estimate: For the Auckland Islands, New Zealand

机译:第一个北部巨型汽油(Macronectes Halli)育种人口调查和估算:对于奥克兰群岛,新西兰

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摘要

This first breeding population estimate of northern giant petrels (Macronectes halli) in the Auckland Islands group involved whole-island censuses, apart from the main Auckland Island, in the 2015-16 breeding season, and multi-year repeat visits to a subset of island colonies. Parallel line-transects in giant petrel habitat were used to survey the number and spatial distribution of pre-fledging chicks. The Auckland Islands 2015-16 whole-island census resulted in a count of 216 northern giant petrel chicks on eight of the 15 islands in the group. Applying a simple correction factor, the breeding population in 2015 is estimated as c. 340 breeding pairs (range 310-390). This estimate is higher than historical non-quantitative records of 50-200 breeding pairs. Multi-year counts on Enderby, Rose, Frenchs, Ocean, Disappointment, and Adams Islands showed some interannual variability, but other island colonies remained more stable. The northern giant petrel colony on Enderby Island has increased from two chicks in 1988 to 96-123 chicks in 2015-18 (four annual counts undertaken).
机译:这种奥克兰群岛集团北方巨型海燕(Macronectes Halli)的第一次育种人口估计涉及全岛普查,除了奥克兰岛,在2015-16赛季,以及对岛屿的一部分的多年重复访问群落。巨型植物栖息地的平行线横断面用于调查预剩余小鸡的数量和空间分布。奥克兰群岛2015-16整个岛屿普查导致了一群15个岛屿中的八个北部北部巨型荔枝的计数。应用简单的校正因素,2015年的繁殖人口估计为C. 340繁殖对(范围310-390)。该估计高于50-200次育种对的历史非定量记录。内人,玫瑰,法国,海洋,失望和亚当斯群岛的多年计数表现出了一些年平变异性,但其他岛屿殖民地仍然更加稳定。 Inderby Island的北方巨型海燕殖民地从1988年的两只小鸡增加到2015 - 18年的96-123雏鸡(进行了四名年度计数)。

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  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2230-2230|共1页
  • 作者单位

    Parker Conservation 126 Maryhill Terrace Dunedin 9011 New Zealand;

    Parker Conservation 126 Maryhill Terrace Dunedin 9011 New Zealand;

    Parker Conservation 126 Maryhill Terrace Dunedin 9011 New Zealand;

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